when exposure status is classified as exposed and unexposed and outcome status i

Q: when exposure status is classified as exposed and unexposed and outcome status i

Odds of exposure among cases a/c = 111/236 = 0.47 Odds of exposure among controls b/d = 29/462 = 0.062 Odds ratio = (a/c)/(b/d) = 7.5 Interpretation The data shows that there is larger exposure of smoking in street children than among the controls as the odds ratio is very high.

ID: 136503 • Letter: W

Question

when exposure status is classified as exposed and unexposed and outcome status is classified as present or absent, the results of a cross-sectional study can be analyzed using a 2x2 table. consider the analytic cross-sectional data in the following table.

Calculate and interpret the prevalance proportion ratio.

smoking among street children in the phillipines

current smoker Phillipine Child Living on Street YES NO TOTAL YES 111 29 140 NO 236 462 698 TOTAL 347 491 838

Explanation / Answer

Odds of exposure among cases a/c = 111/236 = 0.47

Odds of exposure among controls b/d = 29/462 = 0.062

Odds ratio = (a/c)/(b/d) = 7.5

Interpretation

The data shows that there is larger exposure of smoking in street children than among the controls as the odds ratio is very high.

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when exposure status is classified as exposed and unexposed and outcome status i

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